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A lateral (sideways) movement doesn't change the frequency, because in this case, the distance between the object and the observer isn't changing.

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Q: Why the Doppler shift tells us only about the motion directly along the line of sight between a light source and an observer but not about motion across the celestial sphere?
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Does the Doppler effect happen with light?

Yes, the Doppler effect can be applied to light. Any wave function can be subject to the Doppler effect if there is relative motion between the source and an observer. That's how we know that the Universe is expanding.


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The Doppler effect is a change of the frequencey of a wave, due to relative movement between source and observer.


What creates the phenomeon known as red shift?

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The definition for the word eclipse is "an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination."


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What conditions would have to be met in order for an ambulance with its siren on not to exhibit the Doppler effect when it passes you?

As far as I know, there will always be a Doppler effect when there is relative movement between the object that emits sound, and the observer (i.e. you, who are listening to the sound).


What is the definition of Doppler effect?

That refers to a change in frequency in light, sound, or some other wave, from the point of view of an observer, caused by a relative movement between the source and the observer. In other words, the source of a wave moves towards us, or away from us. For more details, I suggest you consult the Wikipedia article on "Doppler effect", or some other similar source.


What is the Doppler Shift as it applies to light?

That's more or less the same as the Doppler shift for other waves: a change of frequency, caused by relative movement between the source and the observer. When the distance is increasing the wavelength of the light increases. When the source of light and the observer are getting closer, the light's wavelength decreases. Red light has a longer wavelength than blue light.


Does the Doppler effect occur when the observer is moving and the source of sound is stationary?

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What is the effect in the change in wave frequency caused by the motion of the source of the wave?

Austrian physicist Christian Johann Doppler (1803-1853)discovered that a wave's frequency changes when the source and observer are in motion relative to one another. This is known as the Doppler effect.


What is the difference between nexard and Doppler?

What is the difference between Doppler and Nexard


The apparent change in frequency as a wave source moves in relation to the listener is called?

The Doppler effect is that apparent change of the frequency of a moving object when someone is stationary. A car may seem to get louder as it gets closer to a person and then the sound will drop as the car gets away.